fix: CI/CD verification - all tests pass (68/68), linting passes, type checking passes

tests/conftest.py

@@ -1,7 +1,7 @@
 """Pytest configuration and fixtures for CodeXchange CLI tests."""
 
 import pytest
-from unittest.mock import MagicMock, patch
+from unittest.mock import MagicMock
 
 from codexchange.models import Language, ConversionRequest, ConversionResult
 from codexchange.config import ConfigSettings